CmdPal: Add local keyboard listener and use it to handle GoBack key (#41122)

## Summary of the Pull Request

Listener registers a hook on WH_KEYBOARD and raises an event when a key
is pressed down. Main window then uses it to handle the GoBack key that
we can't reach any other way.


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## PR Checklist

- [x] Related to: #41011
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

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wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

src/modules/cmdpal/Microsoft.CmdPal.UI/MainWindow.xaml.cs

@@ -27,6 +27,7 @@ using Microsoft.Windows.AppLifecycle;
 using Windows.ApplicationModel.Activation;
 using Windows.Foundation;
 using Windows.Graphics;
+using Windows.System;
 using Windows.UI;
 using Windows.UI.WindowManagement;
 using Windows.Win32;
@@ -44,7 +45,8 @@ public sealed partial class MainWindow : WindowEx,
     IRecipient<DismissMessage>,
     IRecipient<ShowWindowMessage>,
     IRecipient<HideWindowMessage>,
-    IRecipient<QuitMessage>
+    IRecipient<QuitMessage>,
+    IDisposable
 {
     [System.Diagnostics.CodeAnalysis.SuppressMessage("StyleCop.CSharp.NamingRules", "SA1310:Field names should not contain underscore", Justification = "Stylistically, window messages are WM_")]
     [System.Diagnostics.CodeAnalysis.SuppressMessage("StyleCop.CSharp.NamingRules", "SA1306:Field names should begin with lower-case letter", Justification = "Stylistically, window messages are WM_")]
@@ -54,6 +56,7 @@ public sealed partial class MainWindow : WindowEx,
     private readonly WNDPROC? _originalWndProc;
     private readonly List<TopLevelHotkey> _hotkeys = [];
     private readonly KeyboardListener _keyboardListener;
+    private readonly LocalKeyboardListener _localKeyboardListener;
     private bool _ignoreHotKeyWhenFullScreen = true;
 
     private DesktopAcrylicController? _acrylicController;
@@ -116,6 +119,18 @@ public sealed partial class MainWindow : WindowEx,
         {
             Summon(string.Empty);
         });
+
+        _localKeyboardListener = new LocalKeyboardListener();
+        _localKeyboardListener.KeyPressed += LocalKeyboardListener_OnKeyPressed;
+        _localKeyboardListener.Start();
+    }
+
+    private static void LocalKeyboardListener_OnKeyPressed(object? sender, LocalKeyboardListenerKeyPressedEventArgs e)
+    {
+        if (e.Key == VirtualKey.GoBack)
+        {
+            WeakReferenceMessenger.Default.Send(new GoBackMessage());
+        }
     }
 
     private void SettingsChangedHandler(SettingsModel sender, object? args) => HotReloadSettings();
@@ -376,6 +391,7 @@ public sealed partial class MainWindow : WindowEx,
         // WinUI bug is causing a crash on shutdown when FailFastOnErrors is set to true (#51773592).
         // Workaround by turning it off before shutdown.
         App.Current.DebugSettings.FailFastOnErrors = false;
+        _localKeyboardListener.Dispose();
         DisposeAcrylic();
 
         _keyboardListener.Stop();
@@ -682,4 +698,10 @@ public sealed partial class MainWindow : WindowEx,
 
         return PInvoke.CallWindowProc(_originalWndProc, hwnd, uMsg, wParam, lParam);
     }
+
+    public void Dispose()
+    {
+        _localKeyboardListener.Dispose();
+        DisposeAcrylic();
+    }
 }